This ingenious, compact bottle works great for smaller amounts of personal refreshment for hiking, traveling, or camping. No batteries. No chemicals. No pumping. No waiting. Just fill and drink. The fiberglass pre-filter removes all those nasty microorganisms like bacteria and protozoa. The ViruPur insert blocks viruses with electrokinetic filtration. Then activated carbon makes your water taste great too. This MyBottle looks and acts like a sport bottle with flip-up mouthpiece and carry loop, but it performs powerful purification to keep you refreshed and hydrated. Of course, BPA free too.